summaryrefslogtreecommitdiffstats
path: root/include/bmp_layout.h
blob: 63c55648303bfc9e6577a53ff915bf2b8dfb446b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
/* (C) Copyright 2002
 * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/************************************************************************/
/* ** Layout of a bmp file						*/
/************************************************************************/

#ifndef _BMP_H_
#define _BMP_H_

struct bmp_color_table_entry {
	__u8	blue;
	__u8	green;
	__u8	red;
	__u8	reserved;
} __attribute__ ((packed));

/* When accessing these fields, remember that they are stored in little
   endian format, so use linux macros, e.g. le32_to_cpu(width)          */

struct bmp_header {
	/* Header */
	char signature[2];
	__u32	file_size;
	__u32	reserved;
	__u32	data_offset;
	/* InfoHeader */
	__u32	size;
	__u32	width;
	__u32	height;
	__u16	planes;
	__u16	bit_count;
	__u32	compression;
	__u32	image_size;
	__u32	x_pixels_per_m;
	__u32	y_pixels_per_m;
	__u32	colors_used;
	__u32	colors_important;
	/* ColorTable */

} __attribute__ ((packed));

struct bmp_image {
	struct bmp_header header;
	/* We use a zero sized array just as a placeholder for variable
	   sized array */
	struct bmp_color_table_entry color_table[0];
};

/* Data in the bmp_image is aligned to this length */
#define BMP_DATA_ALIGN	4

/* Constants for the compression field */
#define BMP_BI_RGB	0
#define BMP_BI_RLE8	1
#define BMP_BI_RLE4	2

#endif							/* _BMP_H_ */